Year	Percent
2000	91.08965
2001	91.02869
2002	90.96773
2003	90.90677
2004	90.84581
2005	90.78485
2006	90.72389
2007	90.66293
2008	90.60197
2009	90.54101
2010	90.48005
2011	90.41909
2012	90.35813
2013	90.29717
2014	90.23621
2015	90.17525
2016	90.11429
2017	90.11429
2018	90.11429
2019	90.11429
2020	90.11429